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Data for: Synthesis and assessment of schwertmannite/few-layer graphene composite for the degradation of sulfamethazine in heterogeneous Fenton-like reaction

Citation

Wang, Dianzhan; Gu, Ye; Yang, Zhaoshun; Zhou, Lixiang (2020), Data for: Synthesis and assessment of schwertmannite/few-layer graphene composite for the degradation of sulfamethazine in heterogeneous Fenton-like reaction, Dryad, Dataset, https://doi.org/10.5061/dryad.8931zcrm6

Abstract

    Schwertmannite, an iron oxyhydrosulfate mineral, can catalyze Fenton-like reaction to degrade organic contaminants, but the reduction of Fe(III) to Fe(II) on the surface of schwertmannite is a limiting step for the Fenton-like process. In the present study, the schwertmannite/few-layer graphene composite (sch-FLG) was synthesized to promote the catalytic activity of schwertmannite in Fenton-like reaction. It was found that schwertmannite can be successfully carried by FLG in sch-FLG composite, mainly via the chemical bond of Fe-O-C on the surface of sch-FLG. The sch-FLG exhibited a much higher catalytic activity than schwertmannite or FLG for the degradation of SMT in the heterogeneous Fenton-like reaction, which resulted from that the few-layer graphene can pass electrons efficiently. The degradation efficiency of SMT was around 100% under the reaction conditions of H2O2 200-500 mg L-1, sch-FLG dosage 1-2 g L-1, temperature 28-38 °C, and initial solution pH 1-9. During the repeated uses of sch-FLG in Fenton-like reaction, it maintained a certain catalytic activity for the degradation of SMT and the mineral structure was not changed. In addition, SMT may be finally mineralized in Fenton-like reaction catalyzed by sch-FLG, and the possible degradation pathways were proposed. Therefore, the sch-FLG is an excellent catalyst for SMT degradation in heterogeneous Fenton-like reaction.

Methods

The morphology of sch-FLG was characterized by using high-resolution transmission electron microscopy (HRTEM, JEOL). The crystal structure of sch-FLG was characterized by using X-ray diffraction (XRD, Thermo Fisher XTRA) at a scanning rate of 10° min-1 in the 2θ range of 10-70° with Cu-Kα radiation (λ = 1.5406 Å) at room temperature. The surface elements of sch-FLG were characterized by using X-ray photoelectron spectroscopy (XPS, Thermo Scientific ESCALAB 250Xi) system with Al Kα radiation (Energy 1486.6 eV). The Brunauer-Emmett-Teller (BET) specific surface area and Barret-Joyner-Halenda (BJH) pore volume of sch-FLG were measured by using N2 adsorption-desorption method (Tristar 3000, Micromeritics). The chemical structure of sch-FLG was characterized by using the Fourier transform infrared (FTIR, Thermo Nicolet 6700), and the samples were prepared with the powder pressing method in KBr pellet at room temperatu

Usage Notes

Raw data.

Funding

Jiangsu Agriculture Science and Technology Innovation Fund, Award: CX(17)2024

National Natural Science Foundation of China, Award: 41977338

National Natural Science Foundation of China, Award: 21637003